Sorry to correct you, dankh.
This file format is not only used by DVDs.
This could be a format used by Rewriteable CDs, or User Defined Functions for InterBase.
Is it a file extension or does your explorer told you, that the CD is in UDF format ?
If it was the last, you can find a free UDF reader for Win95 and !!!new!!! Windows NT by Adaptec (http://www.adaptec.com/support/files/udfreaders.html).

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